audvid,

Shotgun is two seperate cables, the theory being that by seperating the runs with full range cable and keeping the cable apart it will have a better benefit than an internal bi wire. You can read a lot about that at Audio Asylum in cable section. Just do a search on Shotgun. You can go any number of ways, if you are making the cables simply solder the matching conductors of each cable to the same spade. The speaker end are as normal. YOu can also use a banana and spade combo on the 2 cables keeping them completely seperate as you mentioned, or 2 banana's that are capable of piggy backing into each other. I am not real fond of the piggy back or banana's in general if the cable is where someone might trip and dilodge it. That is easy with the piggy back types that I have seen and with my grandkids a disaster waiting to happen. Hope that helps.